After 10 minutes the surplus material is washed away and any remaining deposit examined with ultra violet light.

10分钟后剩余的物质被冲洗掉，任何残留的沉淀物则会用紫外线进行检测。

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The polygonal segments of the surface react to ultra-violet light, mapping the position and intensity of solar rays.

其表面的多角形组成部分对紫外光产生反应，映射太阳光线的方位和强度。

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They are only visible when they are bathed in ultra-violet light and subjecting them to such constant bombardment would be not only impractical but harmful.

只有当这些壁画沐浴在紫外灯光下时，这些细节之处才得以可见，但将这些传世珍品一直置于紫外灯的狂轰乱炸之下不仅不现实，对壁画本身也有害。

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SmartWater has a chemical fingerprint that links to a crime scene and is only visible under ultra violet light.

BBC: Prestbury war memorial

The action of ultra-violet light from the sun on a molecule called 7-dehydrocholesterol, found in the skin, turns it into the vitamin.

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